So I'm having an issue now with my batteries not charging off my truck or I believe that is the issue anyways. Last time I had the camper on the truck the Happijacs wouldn't go down even with the truck running. I had to plug it into the wall to get them to work. I've heard there maybe a wire or a fuse on the duramaxes that you have to plug in or something. Last time we went out we went out for a couple days and ran the heat for a while and everything but then it was a solid 2.5 hour drive back so I figure the batteries should have been charged by then. These are new batteries too. I'm not near the truck or camper right now as I'm on the slope but trying to get some ideas as the gf wants to take the camper to Homer the day after I come off Slope. Thanks again for all the help guys!